package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 统计指定时间区间的每天营业额数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)) {
             begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天的营业额
        List<Double> turnoverList=  new ArrayList<>();
        for (LocalDate date : dateList) {

            //查询date日期对应的营业额数据,营业额是指:状态为已完成的订单金额总和
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            // select sum(amount) from orders where order_time>beginTime and order_time <endTime and status=5
            Map map = new HashMap<>();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnOver =orderMapper.sumByMap(map);
            if (turnOver==null)
                turnOver = 0.0;

            turnoverList.add(turnOver);
        }

        //封装返回结果
        String join1 = StringUtils.join(dateList, ",");
        String join2 = StringUtils.join(turnoverList, ",");
        return TurnoverReportVO
                .builder()
                .dateList(join1)
                .turnoverList(join2)
                .build();
    }

    /**
     * 统计指定时间区间的每天用户数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
            //存放从begin到end的每天
           List<LocalDate>dateList= new ArrayList<>();
            dateList.add(begin);
            while(!begin.equals(end))
            {
               begin= begin.plusDays(1);
               dateList.add(begin);
            }
            //存放每天新增用户数量 select count(id) from user where create_time>? and create_time<?
            List<Integer> newUserList =new ArrayList<>();
            //存放每天总用户数量 select count(id) from user where create_time <?
            List<Integer> totalUserList=new ArrayList<>();

        for (LocalDate date : dateList) {

        LocalDateTime beginTime= LocalDateTime.of(date,LocalTime.MIN);
        LocalDateTime endTime  = LocalDateTime.of(date,LocalTime.MAX);

          Map map=new HashMap<>();

          map.put("end",endTime);


            Integer totalUserCount = userMapper.countByMap(map);
            totalUserList.add(totalUserCount);

            map.put("begin",beginTime);

            Integer newUserCount = userMapper.countByMap(map);
            newUserList.add(newUserCount);

        }
        String join1 = StringUtils.join(dateList, ",");
        String join2 = StringUtils.join(newUserList, ",");
        String join3 = StringUtils.join(totalUserList, ",");

        return UserReportVO
                .builder()
                .dateList(join1)
                .newUserList(join2)
                .totalUserList(join3)
                .build();
    }

    /**
     * 统计指定时间区间的订单数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO ordersStatistics(LocalDate begin, LocalDate end) {
        //统计从begin到end的每天日期
     List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end))
        {

            begin=begin.plusDays(1);
            dateList.add(begin);

        }
      //每日订单总数
     List<Integer> orderCountList =  new ArrayList<>();
     //每日有效订单总数
     List<Integer> validOrderCountList =  new ArrayList<>();
     //日期段内订单总数
     Integer totalOrderCount=0;
     //日期段内有效订单总数
     Integer validOrderCount=0;
     //订单完成率
     Double orderCompletionRate=0.0;
        for (LocalDate date : dateList) {

            //每天的开始时间与结束时间
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            //select count(id) from orders where order_time>? and order_time<? 求每日订单
            //select count(id) from orders where order_time>? and order_time<? and status=5 求每日有效订单

        Map map=new HashMap<>();
        map.put("begin",beginTime);
        map.put("end",endTime);

     Integer dayOrders=orderMapper.getOrderStatistics(map);
     orderCountList.add(dayOrders);

     map.put("status",Orders.COMPLETED);

     Integer dayEffectiveOrders = orderMapper.getOrderStatistics(map);
      validOrderCountList.add(dayEffectiveOrders);


     totalOrderCount+=dayOrders;

     validOrderCount+=dayEffectiveOrders;


        }
        if (totalOrderCount!=0)
        orderCompletionRate= validOrderCount.doubleValue()/totalOrderCount;

        String join1 = StringUtils.join(dateList, ",");
        String join2 = StringUtils.join(orderCountList, ",");
        String join3 = StringUtils.join(validOrderCountList, ",");

        return OrderReportVO
                .builder()
                .dateList(join1)
                .orderCountList(join2)
                .validOrderCountList(join3)
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    @Override
    public SalesTop10ReportVO ordersTop10(LocalDate begin, LocalDate end) {

        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> nameAndNumberList;
        nameAndNumberList = orderMapper.getNameAndNumberByDate(beginTime,endTime);

        List<String> nameList = nameAndNumberList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numberList = nameAndNumberList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String join1 = StringUtils.join(nameList, ",");
        String join2 = StringUtils.join(numberList, ",");

        return SalesTop10ReportVO
                .builder()
                .nameList(join1)
                .numberList(join2)
                .build();
    }

    /**
     * 导出Excel报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1.查询数据库,获取营业数据---查询最近30天的运营数据
        LocalDate beginDate = LocalDate.now().minusDays(30);
        LocalDate endDate = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(beginDate, LocalTime.MIN), LocalDateTime.of(endDate, LocalTime.MAX));


        //2.通过POI将数据写入Excel文件
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");


        try {
            //基于模板文件创建一个新的Excel文件

            XSSFWorkbook excel = new XSSFWorkbook(in);


            //获取表格中的sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间: "+beginDate+"至"+endDate);

            //获得第4行
            XSSFRow row = sheet.getRow(3);

            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row= sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {

                LocalDate date = beginDate.plusDays(1);
                //查询某一天的营业数据
                workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessDataVO.getTurnover());
                row.getCell(3).setCellValue(businessDataVO.getValidOrderCount());
                row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessDataVO.getUnitPrice());
                row.getCell(6).setCellValue(businessDataVO.getNewUsers());


            }

            //3.通过输出流将Excel文件下载到客户端浏览器

            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);

            //关闭资源
            outputStream.close();
            excel.close();
        }catch (IOException e) {
            e.printStackTrace();
        }



    }
}
